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The analog audio inputs have the following characteristics:
•
Active balanced
•
Line level: -7 to +8 dBu nominal level (See section 3.3.1).
•
Maximum input level (clip point): 18dBu
•
Bridging ≥ 100KΩ impedance
The inputs are designed to be sourced from balanced, line level signals. Older
equipment with a transformer output stage may need a terminating resistor across
pins 2 and 3, consult the manual for your equipment for how to use it with high
impedance inputs.
When using unbalanced sources we recommend using pin 2 and 3 to connect the
signal and ground, respectively. By leaving pin 1 unconnected, you will prevent
ground loops.
Clipping the inputs should be avoided, as it will cause a decrease in hybrid
performance. Some consoles with high amounts of headroom may cause clipping. A
10 dB pad will help in these cases.
HOT TIP!
The signal fed to these inputs should be a mix- minus or system performance will be
severely degraded.
h
The sensitivity of the send inputs are adjusted using the Audio menu Input Level
selection. You will need to set these according to the levels expected at the Hybrid
input. When in the studio in position, the left LED level meter indicates the level
after the menu adjustment, but before any of the Hybrid's digital level adjustments.
See Section 3.1 & Section 3.3.1 for additional information.
CURIOSITY NOTE!
The Telos 2101 Studio Interface has the more common pin- outs used for three pin
XLR inputs & outputs. You can easily remember the correct signals when wiring
connectors using the phrase "George Washington Bridge." Pin 1 = G = Ground, Pin 2 =
W = "+" = White (typical color in mic cable, if there is no white there will be a red
?
conductor), and Pin 3 = B = "- " = Black.
IV-28
TELOS 2101 USER'S MANUAL
PART IV
THE STUDIO INTERFACE & ADDITIONAL HYBRIDS
SECTION 1 – STUDIO INTERFACE INSTALLATION
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